package com.shuang.mapper;

import com.shuang.pojo.Dept;
import org.apache.ibatis.annotations.*;

import java.util.List;

/*
* 部门信息
* */

@Mapper
public interface DeptMapper {

    @Select("select id, name, create_time, update_time from dept order by update_time desc")
    List<Dept> findAll();

    @Delete("delete from dept where id = #{id}")
    void deleteById(Integer id);

    @Insert("insert into dept(name, create_time, update_time) values(#{name}, #{createTime}, #{updateTime})")
    void addDept(Dept dept);

    @Select("select id, name, create_time, update_time from dept where id = #{id}")
    Dept getInfo(Integer id);

    @Update("update dept set name = #{name}, update_time = #{updateTime} where id = #{id}")
    void update(Dept dept);

    /*根据部门id查询员工人数*/
    @Select("select count(*) empNum from emp e left join dept d on e.dept_id = d.id where e.dept_id = #{id}")
    Integer empNumByDeptId(Integer id);
}
